<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
<div id="app">
    <cpn2></cpn2>
</div>

<script src="../js/vue.js"></script>
<script>
    // 1. 创建第一个组件构造器（子组件）
    const cpnC1 = Vue.extend({
        template: `
        <div>
            <h2>我是标题1</h2>
            <p>我是内容，哈哈哈哈哈</p>
            <cpn2></cpn2>
        </div>
        `
    })

     // 1. 创建第二个组件构造器（父组件）
    const cpnC2 = Vue.extend({
        template: `
        <div>
            <h2>我是标题2</h2>
            <p>我是内容，呵呵呵呵呵</p>
            <cpn1></cpn1>
        </div>
        `,
        components: {
            cpn1: cpnC1
        }
    })
    const app = new Vue({
        el: '#app',
        data: {
            message: 'Hello Vue!'
        },
        components: {
            cpn2: cpnC2
        }
    })
</script>
</body>
</html>